- struct tm *tm = gmtime(&t);
- return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm->tm_wday],
- tm->tm_mday, month[tm->tm_mon], 1900 + tm->tm_year,
- tm->tm_hour, tm->tm_min, tm->tm_sec);
+ struct tm tm;
+ gmtime_r(&t, &tm);
+ return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm.tm_wday],
+ tm.tm_mday, month[tm.tm_mon], 1900 + tm.tm_year,
+ tm.tm_hour, tm.tm_min, tm.tm_sec);